"Instagram does a few things really well - 1.) Help make photos look pretty"
I've never seen an instagram photo I've thought of as 'pretty'. I'm not really a fan of seeing pictures other people's lunches and bathrooms, but maybe I'm just weird.
I've seen plenty of Instagram photos I've found as "pretty". Personally, I think the filters can be annoying, though...but it seems as if most people enjoy them.